CN102786039A - Preparation method of water soluble ZnSe quantum dots - Google Patents
Preparation method of water soluble ZnSe quantum dots Download PDFInfo
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- CN102786039A CN102786039A CN2012103162225A CN201210316222A CN102786039A CN 102786039 A CN102786039 A CN 102786039A CN 2012103162225 A CN2012103162225 A CN 2012103162225A CN 201210316222 A CN201210316222 A CN 201210316222A CN 102786039 A CN102786039 A CN 102786039A
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Abstract
The invention provides a preparation method of water soluble ZnSe quantum dots, comprising the following steps of: mixing zinc source soluble compound, copper source soluble compound and sulfydryl containing carboxylic acid compound in water, adjusting pH value to 8 to 12, so as to obtain a mixed solution; mixing the mixed solution with a selenium sodium hydride solution to obtain a precursor solution; and obtaining the water soluble ZnSe quantum dots after the hydrothermal reaction. Compared with the water phase preparation method of quantum dots in the prior art, due to the fact that the quantum dots are synthesized by the hydrothermal reaction, so that the high temperature and pressure of the hydrothermal reaction provide enough activation energy to the ordering and reordering of the surfaces of the quantum dots firstly, then the surface default of the quantum dots is reduced and the fluorescence quantum efficiency of the quantum dots is enhanced; secondly, under the high temperature condition of the hydrothermal reaction, the solvent water is located at subcritical and has high reaction activity, so the growth efficiency of the quantum dots is enhanced and the reaction time is shortened.
Description
Technical field
The invention belongs to field of nanometer technology, relate in particular to a kind of preparation method of water soluble ZnSe quantum dots.
Background technology
Semiconductor-quantum-point is also referred to as semiconductor nano, the compound that normally is made up of IIB-VI family or III-V family atom and Siliciumatom.Because the diameter of semiconductor-quantum-point is less than its Bohr radius; Therefore show special physics and chemical property; Especially the size of semiconductor-quantum-point and structure make it have quantum size effect and dielectric confinement effect, and derive the superior characteristics of luminescence of semiconductor-quantum-point thus.Compare with organic fluorescent dye; Quantum dot has the excitation spectrum wide ranges, emmission spectrum is narrow, fluorescence intensity is high, different fluorescence color can be used advantages such as same excitation light source excites, therefore is widely used in fields such as biomarker, bio-imaging, tunable laser, solar cell.But, study quantum dots such as more CdSe, CdTe at present, owing to use deleterious heavy metal element, the potential bio-toxicity has limited the application development of these semiconductor-quantum-points.
Transition-metal ion doping of Zn based semiconductor quantum dot; Not only can on the basis that keeps the good characteristics of luminescence of semiconductor-quantum-point, overcome the bio-toxicity problem, but also have less freely absorb, advantages such as high lifetime of excited state, high chemicalstability and thermostability.At present, the research about transitional metal ion mixing Zn based semiconductor quantum dot mainly concentrates on Mn doping and Cu doping.In the adulterated quantum dot of Mn, the emission of mixing derives from exciton at Mn
2+Compound between the ion 3d energy level, emmission spectrum is limited in 580 ~ 600nm interval.And the adulterated quantum dot of Cu, the emission of mixing derives from exciton at semi-conductor conduction band and Cu
2+Compound between the ion 3d energy level can be through regulating the emmission spectrum that semi-conductive component and size obtain a wide fluorescence scope.
Synthesizing of Cu doped ZnS e quantum dot is main through two kinds of methods: organic synthesis and water are synthetic.The quantum dot of organic synthesis does not have biocompatibility, must carry out aftertreatment, makes the surface of semiconductor-quantum-point connect suitable hydrophilic functional group.Compare with organic synthesis, water synthesizes zinc source compound, copper source compound and sodium hydrogen selenide prepared in reaction quantum dot in the aqueous solution, and the quantum dot that obtains has excellent biological compatibility.
At present; Research about the synthetic quantum dot of water is less; People such as Zhang propose under the water condition synthetic Cu doped ZnS e quantum dot first, but the water soluble ZnSe that obtains: the less stable that Cu is nanocrystalline, and fluorescence efficiency is also low is merely 5.0%; And need under refluxad react 1 ~ 14h, the reaction times is longer.And people such as Cui have synthesized the Cu:ZnSe/ZnS quantum dot of nucleocapsid structure on this basis, have improved the stability of Cu doped quantum dot, but fluorescence quantum efficiency also on the low side be 8.9%, and reaction process is complicated.
Summary of the invention
In view of this, the technical problem that the present invention will solve is to provide a kind of preparation method of water soluble ZnSe quantum dots, and this method can prepare the higher water soluble ZnSe quantum dots of fluorescence quantum efficiency in the short period of time.
The invention provides a kind of preparation method of water soluble ZnSe quantum dots, may further comprise the steps:
A) zinc source soluble compound, copper source soluble compound are mixed stirring with the carboxylic acid compound that contains sulfydryl in water, regulate pH value to 8 ~ 12, obtain mixing solutions;
B) said mixing solutions is mixed with sodium hydrogen selenide solution, obtain precursor solution, after the hydro-thermal reaction, obtain water soluble ZnSe quantum dots.
Preferably, said sodium hydrogen selenide solution prepares according to following method:
Is 1 with selenium powder and Peng Qinghuana according to mol ratio: the ratio of (2 ~ 8) is soluble in water, obtains sodium hydrogen selenide solution after the reaction.
Preferably, the concentration of said sodium hydrogen selenide solution is 0.01 ~ 0.75mol/L.
Preferably, the said carboxylic acid compound that contains sulfydryl is 3-thiohydracrylic acid, dimercaptosuccinic acid, Thiovanic acid, halfcystine, 2 mercaptopropionic acid, sulfydryl butyric acid, sulfydryl valeric acid, mercaptohexanoic acid, sulfydryl enanthic acid, sulfydryl is sad or the sulfydryl n-nonanoic acid.
Preferably, the mol ratio of said zinc source soluble compound and copper source soluble compound is 1: (0.004 ~ 0.0065).
Preferably, said zinc source soluble compound is 1 with the mol ratio that contains the carboxylic acid compound of sulfydryl: (2 ~ 3).
Preferably, the mol ratio of zine ion and plasma selenium is 1 in the said precursor solution: (0.18 ~ 0.25).
Preferably, the temperature of reaction of said hydro-thermal reaction is 130 ℃ ~ 200 ℃, and the reaction times is 10 ~ 70min.
Preferably, said steps A is specially:
A1) zinc source soluble compound is soluble in water, obtain zinc source storing solution;
Copper source soluble compound is soluble in water, obtain copper source storing solution;
A2) said zinc source storing solution is mixed with said copper source storing solution, add the carboxylic acid compound that contains sulfydryl, mix and stir, regulate pH value to 8 ~ 12, obtain mixing solutions.
Preferably, the concentration of said zinc source storing solution is 0.01 ~ 0.1mol/L.
The invention provides a kind of preparation method of water soluble ZnSe quantum dots, this method is mixed stirring with zinc source soluble compound, copper source soluble compound with the carboxylic acid compound that contains sulfydryl in water, regulates pH value to 8 ~ 12, obtains mixing solutions; Mix with sodium hydrogen selenide solution then, obtain precursor solution, after the hydro-thermal reaction, obtain water soluble ZnSe quantum dots.Being equipped with quantum dot with water legal system in the prior art compares; The present invention adopts hydro-thermal reaction to synthesize quantum dot; At first; The higher temperature and pressure of hydro-thermal reaction is that the quantum dot surface provides enough activation energy with resetting in order, reduces the surface imperfection of quantum dot, has improved the fluorescence quantum efficiency of quantum dot; Secondly, under the higher temperature condition of hydro-thermal reaction, aqueous solvent is in the subcritical range, has high reaction activity and high, has improved the growth efficiency of quantum dot, has shortened the reaction times.
Experimental result shows that the fluorescence efficiency of the water soluble ZnSe quantum dots that the present invention prepares is more than 10%.
Description of drawings
Fig. 1 is the ultraviolet-visible absorption spectroscopy and the fluorescence emission spectrogram of the water soluble ZnSe quantum dots of the embodiment of the invention 1 preparation;
Fig. 2 is the ultraviolet-visible absorption spectroscopy and the fluorescence emission spectrogram of the water soluble ZnSe quantum dots of the embodiment of the invention 2 preparations;
Fig. 3 is the ultraviolet-visible absorption spectroscopy and the fluorescence emission spectrogram of the water soluble ZnSe quantum dots of the embodiment of the invention 3 preparations.
Embodiment
The invention provides a kind of preparation method of water soluble ZnSe quantum dots; May further comprise the steps: A) zinc source soluble compound, copper source soluble compound are mixed stirring with the carboxylic acid compound that contains sulfydryl in water; And the pH value of solution is adjusted to 8 ~ 12, obtain mixing solutions; B) said mixing solutions is mixed with sodium hydrogen selenide solution, obtain precursor solution, after the hydro-thermal reaction, obtain water soluble ZnSe quantum dots.
Wherein, Said sodium hydrogen selenide solution is preferably according to following method preparation: under the condition of protection of inert gas; Is 1 with selenium powder and Peng Qinghuana according to mol ratio: the ratio of (2 ~ 8) is soluble in water, and heating is dissolved both fully, obtains sodium hydrogen selenide solution; Be preferably 1: (4 ~ 8), more preferably 1: (6 ~ 8).The concentration of said sodium hydrogen selenide solution is 0.01 ~ 0.75mol/L, is preferably 0.01 ~ 0.40mol/L, more preferably 0.01 ~ 0.20mol/L.Said aqueous solvent is preferably redistilled water or ultrapure water, and ultrapure water more preferably can avoid impurity and ionogen in the solvent to the influence of quantum dot nucleation process.Said rare gas element is a rare gas element well known to those skilled in the art, is preferably argon gas or nitrogen.
In order to clearly demonstrate the present invention, below respectively the experimentation of steps A and step B is described in detail.
According to the present invention, said steps A is specially: A1) that zinc source soluble compound is soluble in water, obtain zinc source storing solution; Copper source soluble compound is soluble in water, obtain copper source storing solution; A2) said zinc source storing solution is mixed with copper source storing solution, add the carboxylic acid compound that contains sulfydryl, mix and stir, regulate pH value to 8 ~ 12, after continuing to feed rare gas element 20 ~ 40min, obtain mixing solutions.Said aqueous solvent is preferably redistilled water or ultrapure water, more preferably ultrapure water.
In the steps A 1, said zinc source soluble compound is preferably the soluble salt compounds of zinc such as zinc nitrate or zinc chloride, more preferably zinc nitrate.The concentration of said zinc source storing solution is 0.01 ~ 0.1mol/L, is preferably 0.05 ~ 0.1mol/L, more preferably 0.08 ~ 0.1mol/L.Said copper source soluble compound is preferably the soluble salt compounds of copper such as cupric nitrate or cupric chloride, more preferably cupric nitrate.The concentration of said copper source storing solution is 0.001 ~ 0.01mol/L, is preferably 0.001 ~ 0.005mol/L, more preferably 0.001 ~ 0.003mol/L.
In the steps A 2, zinc source storing solution is 1 with copper source storing solution according to zine ion and cupric ion mol ratio: the ratio of (0.004 ~ 0.0065) is mixed, and is preferably 1: (0.005 ~ 0.0065).The said carboxylic acid compound that contains sulfydryl is preferably 3-thiohydracrylic acid, dimercaptosuccinic acid, Thiovanic acid, halfcystine, 2 mercaptopropionic acid, sulfydryl butyric acid, sulfydryl valeric acid, mercaptohexanoic acid, sulfydryl enanthic acid, sulfydryl is sad or the sulfydryl n-nonanoic acid, more preferably Thiovanic acid, thiohydracrylic acid or sulfydryl butyric acid.Said zinc source soluble compound is 1 with the mol ratio that contains the carboxylic acid compound of sulfydryl: (2 ~ 3) are preferably 1: (2 ~ 2.5).
The pH value of said mixing solutions is 8 ~ 12, is preferably 9 ~ 12, more preferably 10 ~ 11, and preferably adopt NaOH solution to regulate, more preferably adopt the NaOH solution of 1 ~ 2mol/L that the pH value of solution is regulated.The pH value of solution can influence the surperficial electrical properties of quantum dot and the thickness of electrostatic double layer, and then can influence the speed of growth and the stability of quantum dot.PH value condition of the present invention is the comparatively stable condition of quantum dot, and its speed of growth is very fast.
According to the present invention; Zinc source storing solution and copper source storing solution can prepare respectively; Make things convenient for next step preparation zine ion quantum dot different with copper ion concentration content, also can zinc source soluble compound and copper source soluble compound is simultaneously soluble in water, be prepared into the storing solution that contains zinc source and copper source.
According to the present invention, said step B is specially: said mixing solutions is mixed with sodium hydrogen selenide solution stir 5 ~ 30min, preferred 6 ~ 15min; Obtain precursor solution, it is transferred in the hydrothermal reaction kettle, be heated to 130 ℃ ~ 200 ℃; Be preferably 150 ℃ ~ 180 ℃; Carry out hydro-thermal reaction 10 ~ 70min, be preferably 30 ~ 60min, obtain water soluble ZnSe quantum dots.Also can directly in hydrothermal reaction kettle, mix, need not shift reaction liquid, mix the back direct heating and carry out hydro-thermal reaction.The mol ratio of zine ion and plasma selenium is 1 in the said precursor solution: (0.18 ~ 0.25) is preferably 1: (0.19 ~ 0.22).
It is selenium source that the present invention adopts sodium hydrogen selenide; Zinc source soluble compound is the zinc source; Reaching copper source soluble compound is the copper source, is stablizer with the carboxylic acid compound that contains sulfydryl, through the adulterated method of nucleation; Make water soluble ZnSe quantum dots, nucleation is mixed and can obviously be improved the stability and the illumination effect of quantum dot.
The present invention utilizes hydro-thermal reaction to prepare quantum dot in hydrothermal reaction kettle; This method has broken through the restriction of temperature in the ortho-water phase reaction; For the growth of quantum dot provides sufficiently high temperature of reaction and pressure, improved the growth velocity of quantum dot, shortened the reaction times; And under the environment of hydro-thermal reaction, aqueous solvent is in the subcritical range, has high reaction activity and high, makes reaction to carry out fast.
Because in Cu doped semiconductor quantum dot, the emission of mixing derives from semi-conductor conduction band and Cu
2+Compound between the ion 3d energy level; The surface imperfection of this exciton composite pathway and non-fluorescent radiation is compound vies each other; And hydro-thermal reaction to be quantum dot surface provide enough activation energy with resetting in order, make its surface imperfection that effectively reduces quantum dot, improve fluorescence quantum efficiency.
Can know that by experimental result the fluorescence efficiency of the water soluble ZnSe quantum dots that the present invention prepares is more than 10%.
In order to further specify the present invention, the preparation method of a kind of water soluble ZnSe quantum dots provided by the invention is described in detail below in conjunction with embodiment.
Used reagent is commercially available in following examples.
Embodiment 1
1.1 under argon shield, 0.0016g selenium powder and 0.006g Peng Qinghuana are dissolved in the 2ml ultrapure water, suitably heating is dissolved it fully, obtains sodium hydrogen selenide solution.
1.2 with 1.4874g Zn (NO
3)
26H
2O is dissolved in the 50ml ultrapure water, and obtaining concentration is the zinc source storing solution of 0.1mol/L; With 0.0151g Cu (NO
3)
23H
2O is dissolved in the 50ml ultrapure water, and obtaining concentration is the copper source storing solution of 0.00125mol/L.
1.3 the 0.0214g thiohydracrylic acid is dissolved in the 7ml ultrapure water; The copper source storing solution that obtains among zinc source storing solution that obtains among the adding 1ml 1.2 and the 0.5ml 1.2, after the mixing, the NaOH of adding 2mol/L is adjusted to 10.02 with the pH value of solution; After feeding argon gas 30min, obtain mixing solutions.
1.4 with the sodium hydrogen selenide solution that obtains in the mixing solutions and 1.1 that obtains in 1.3 mix stir 10min after, be transferred in the hydrothermal reaction kettle, be warming up to 160 ℃, reaction 45min obtains water soluble ZnSe quantum dots, fluorescence quantum efficiency is 13.2%.
Utilize ultraviolet-visible pectrophotometer and XRF that the water soluble ZnSe quantum dots that obtains in 1.4 is analyzed; Obtain its ultraviolet-visible absorption spectroscopy and fluorescence emission spectrogram; As shown in Figure 1, can know that by Fig. 1 the emission wavelength of the water soluble ZnSe quantum dots that obtains in 1.4 is 450nm.
Embodiment 2
2.1 under argon shield, 0.0127g selenium powder and 0.0499g Peng Qinghuana are dissolved in the 10ml ultrapure water, suitably heating is dissolved it fully, obtains sodium hydrogen selenide solution.
2.2 with 1.4874g Zn (NO
3)
26H
2O is dissolved in the 50ml ultrapure water, and obtaining concentration is the zinc source storing solution of 0.1mol/L; With 0.0151g Cu (NO
3)
23H
2O is dissolved in the 50ml ultrapure water, and obtaining concentration is the copper source storing solution of 0.00125mol/L.
2.3 the 0.1715g thiohydracrylic acid is dissolved in the 13ml ultrapure water; The copper source storing solution that obtains among zinc source storing solution that obtains among the adding 8ml 2.2 and the 4ml 2.2, after the mixing, the NaOH of adding 2mol/L is adjusted to 10.04 with the pH value of solution; After feeding argon gas 30min, obtain mixing solutions.
2.4 with the sodium hydrogen selenide solution that obtains in the mixing solutions and 2.1 that obtains in 2.3 mix stir 10min after, be transferred in the hydrothermal reaction kettle, be warming up to 160 ℃, reaction 55min obtains water soluble ZnSe quantum dots, fluorescence quantum efficiency is 17.2%.
Utilize ultraviolet-visible pectrophotometer and XRF that the water soluble ZnSe quantum dots that obtains in 2.4 is analyzed; Obtain its ultraviolet-visible absorption spectroscopy and fluorescence emission spectrogram; As shown in Figure 2, can know that by Fig. 2 the emission wavelength of the water soluble ZnSe quantum dots that obtains in 2.4 is 470nm.
Embodiment 3
3.1 under argon shield, 0.0017g selenium powder and 0.0061g Peng Qinghuana are dissolved in the 3ml ultrapure water, suitably heating is dissolved it fully, obtains sodium hydrogen selenide solution.
3.2 with 1.4874g Zn (NO
3)
26H
2O is dissolved in the 50ml ultrapure water, and obtaining concentration is the zinc source storing solution of 0.1mol/L; With 0.0151g Cu (NO
3)
23H
2O is dissolved in the 50ml ultrapure water, and obtaining concentration is the copper source storing solution of 0.00125mol/L.
3.3 the 0.0215g thiohydracrylic acid is dissolved in the 6ml ultrapure water; The copper source storing solution that obtains among zinc source storing solution that obtains among the adding 1ml 3.2 and the 0.5ml 3.2, after the mixing, the NaOH of adding 2mol/L is adjusted to 11.01 with the pH value of solution; After feeding argon gas 30min, obtain mixing solutions.
3.4 with the sodium hydrogen selenide solution that obtains in the mixing solutions and 3.1 that obtains in 3.3 mix stir 10min after, be transferred in the hydrothermal reaction kettle, be warming up to 180 ℃, reaction 40min obtains water soluble ZnSe quantum dots, fluorescence quantum efficiency is 14.1%.
Utilize ultraviolet-visible pectrophotometer and XRF that the water soluble ZnSe quantum dots that obtains in 3.4 is analyzed; Obtain its ultraviolet-visible absorption spectroscopy and fluorescence emission spectrogram; As shown in Figure 3, can know that by Fig. 3 the emission wavelength of the water soluble ZnSe quantum dots that obtains in 3.4 is 462nm.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (10)
1. the preparation method of a water soluble ZnSe quantum dots is characterized in that, may further comprise the steps:
A) zinc source soluble compound, copper source soluble compound are mixed stirring with the carboxylic acid compound that contains sulfydryl in water, regulate pH value to 8 ~ 12, obtain mixing solutions;
B) said mixing solutions is mixed with sodium hydrogen selenide solution, obtain precursor solution, after the hydro-thermal reaction, obtain water soluble ZnSe quantum dots.
2. preparation method according to claim 1 is characterized in that, said sodium hydrogen selenide solution prepares according to following method:
Is 1 with selenium powder and Peng Qinghuana according to mol ratio: the ratio of (2 ~ 8) is soluble in water, obtains sodium hydrogen selenide solution after the reaction.
3. preparation method according to claim 1 is characterized in that, the concentration of said sodium hydrogen selenide solution is 0.01 ~ 0.75mol/L.
4. preparation method according to claim 1; It is characterized in that the said carboxylic acid compound that contains sulfydryl is 3-thiohydracrylic acid, dimercaptosuccinic acid, Thiovanic acid, halfcystine, 2 mercaptopropionic acid, sulfydryl butyric acid, sulfydryl valeric acid, mercaptohexanoic acid, sulfydryl enanthic acid, sulfydryl is sad or the sulfydryl n-nonanoic acid.
5. preparation method according to claim 1 is characterized in that, the mol ratio of said zinc source soluble compound and copper source soluble compound is 1: (0.004 ~ 0.0065).
6. preparation method according to claim 1 is characterized in that, said zinc source soluble compound is 1 with the mol ratio that contains the carboxylic acid compound of sulfydryl: (2 ~ 3).
7. preparation method according to claim 1 is characterized in that, the mol ratio of zine ion and plasma selenium is 1 in the said precursor solution: (0.18 ~ 0.25).
8. preparation method according to claim 1 is characterized in that, the temperature of reaction of said hydro-thermal reaction is 130 ℃ ~ 200 ℃, and the reaction times is 10 ~ 70min.
9. preparation method according to claim 1 is characterized in that, said steps A is specially:
A1) zinc source soluble compound is soluble in water, obtain zinc source storing solution;
Copper source soluble compound is soluble in water, obtain copper source storing solution;
A2) said zinc source storing solution is mixed with said copper source storing solution, add the carboxylic acid compound that contains sulfydryl, mix and stir, regulate pH value to 8 ~ 12, obtain mixing solutions.
10. preparation method according to claim 9 is characterized in that, the concentration of said zinc source storing solution is 0.01 ~ 0.1mol/L.
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| CN103552999A (en) * | 2013-10-25 | 2014-02-05 | 湖南科技大学 | Method for preparing quantum dots at low temperature |
| CN103558194A (en) * | 2013-10-21 | 2014-02-05 | 山东交通学院 | Preparation method and application of CdSe/ZnS core-shell quantum dots |
| CN104229758A (en) * | 2013-06-07 | 2014-12-24 | 吉林师范大学 | Preparation method for large size ZnSe nanosheet |
| CN105950152A (en) * | 2016-06-24 | 2016-09-21 | 吉林大学 | Method for enhancing fluorescence efficiency of cadmium selenide quantum dots |
| CN111562246A (en) * | 2020-06-29 | 2020-08-21 | 中南林业科技大学 | Light irradiation Mn: ZnSe @ ZnS quantum dot photoelectric sensor and preparation method and application thereof |
| CN114570395A (en) * | 2022-02-28 | 2022-06-03 | 青岛科技大学 | Hollow zinc copper selenide/zinc sulfide/zinc titanate nano composite material and preparation method and application thereof |
| CN114752375A (en) * | 2021-12-29 | 2022-07-15 | 江西省农业科学院农产品质量安全与标准研究所 | Preparation method of manganese-doped zinc sulfide quantum dot material |
| WO2023040991A1 (en) * | 2021-09-16 | 2023-03-23 | 浙江大学 | Precursor composition and preparation method therefor, and preparation method for inorganic nanocrystal |
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| CN104229758A (en) * | 2013-06-07 | 2014-12-24 | 吉林师范大学 | Preparation method for large size ZnSe nanosheet |
| CN103558194B (en) * | 2013-10-21 | 2017-01-04 | 山东交通学院 | A kind of preparation method and application of CdSe/ZnS core-shell quanta dots |
| CN103558194A (en) * | 2013-10-21 | 2014-02-05 | 山东交通学院 | Preparation method and application of CdSe/ZnS core-shell quantum dots |
| CN103552999B (en) * | 2013-10-25 | 2015-06-17 | 湖南科技大学 | Method for preparing quantum dots at low temperature |
| CN103552999A (en) * | 2013-10-25 | 2014-02-05 | 湖南科技大学 | Method for preparing quantum dots at low temperature |
| CN105950152B (en) * | 2016-06-24 | 2018-02-13 | 吉林大学 | A kind of method for improving CdSe quantum dots fluorescence efficiency |
| CN105950152A (en) * | 2016-06-24 | 2016-09-21 | 吉林大学 | Method for enhancing fluorescence efficiency of cadmium selenide quantum dots |
| CN111562246A (en) * | 2020-06-29 | 2020-08-21 | 中南林业科技大学 | Light irradiation Mn: ZnSe @ ZnS quantum dot photoelectric sensor and preparation method and application thereof |
| CN111562246B (en) * | 2020-06-29 | 2023-06-27 | 中南林业科技大学 | Light irradiation Mn ZnSe@ZnS quantum dot photoelectric sensor and preparation method and application thereof |
| WO2023040991A1 (en) * | 2021-09-16 | 2023-03-23 | 浙江大学 | Precursor composition and preparation method therefor, and preparation method for inorganic nanocrystal |
| CN114752375A (en) * | 2021-12-29 | 2022-07-15 | 江西省农业科学院农产品质量安全与标准研究所 | Preparation method of manganese-doped zinc sulfide quantum dot material |
| CN114570395A (en) * | 2022-02-28 | 2022-06-03 | 青岛科技大学 | Hollow zinc copper selenide/zinc sulfide/zinc titanate nano composite material and preparation method and application thereof |
| CN114570395B (en) * | 2022-02-28 | 2023-08-11 | 青岛科技大学 | Hollow zinc copper selenide/zinc sulfide/zinc titanate nanocomposite and preparation method and application thereof |
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Application publication date: 20121121 |